Mk IV cluster swap: how close of a match is needed?

[rsvw]

I'm looking at replacing a faulty instrument cluster on a 2002 Jetta (2.0l 5-speed). I'm looking at used ones and want to know how close of a match I need to find. As I read it, even if I have the same part number, the internal software in the cluster may not be compatible if the cars are too different. I'm hoping for some clarification on that. In particular, if I find one with the same part number, what else needs to be the same between the new and old cluster:

Model year
Engine fuel
Engine displacement
Transmission
Anything else?


Thanks.......

[rsvw]

I should have mentioned that I own a VAG-Comm, so reprogramming is possible.

[1999.5GTIVR6]

you cant just do it with a vag comm. its an easy swap manualy but theres computer stuff you cant reprogram with out special software and its expensive